#define _CRT_SECURE_NO_WARNINGS 1
#include "Head.h"


class Solution {
public:
    int uniquePaths(int m, int n) {
        vector<vector<int>> dp(m + 1, vector<int>(n + 1, 0));
        dp[1][0] = 1;
        for (int i = 1; i <= m; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                dp[i][j] = dp[i - 1][j] + dp[i][j - 1];
            }
        }
        return dp[m][n];
    }
};

class Solution {
public:
    int uniquePathsWithObstacles(vector<vector<int>>& ob)
    {
        int m = ob.size(), n = ob[0].size();
        vector<vector<int>> dp(m + 1, vector<int>(n + 1, 0));
        dp[1][0] = 1;
        for (int i = 1; i <= m; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                if (ob[i - 1][j - 1] == 0)
                    dp[i][j] = dp[i - 1][j] + dp[i][j - 1];
            }
        }
        return dp[m][n];
    }
};

int main()
{
    Solution s;
    int ret  =  s.uniquePaths(3,2);
    cout << ret << endl;
}